User`s guide

Volume 3—Power Distribution and Control Assemblies CA08100004E—November 2013 www.eaton.com V3-T9-233
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9.4
Metering Devices, Protective Relays, Software and Connectivity
Protective Relays
Ground Current Stages 50G(X), 50N(X), 51G(X), 51N(X)
Circuit Breaker Failure Protection 50BF
Note
The tripping delay relates to the time between pickup and trip. The tolerance of the operating time relates to the time between the measured value has exceeded the threshold until
the protection stage is alarmed.
Description Range Step Tolerance
Pickup If the pick-up value is exceeded, the module/stage is started. 0.01–40.00 x I
n
0.01 x I
n
±1.5% of the setting value resp. 1% I
n
Resetting ratio 97% or 0.5% x I
n
——
t Tripping delay 0.00–300.00 x s 0.01 x s DEFT ±% resp. ±10 ms
Operating time Starting from lG higher than 1.1 x l> — — <+35 ms
Disengaging time — — <+45 ms
t-multiplier Tripping characteristic factor 0.05–2.00 0.0 ±5%
IEC NINV 0.05–2.00 0.0 ±5%
IEC VINV 0.05–2.00 0.0 ±5%
IEC EINV 0.05–2.00 0.0 ±5%
IEC LINV 0.05–2.00 0.0 ±5%
ANSI MINV 0.05–2.00 0.0 ±5%
ANSI EINV 0.05–2.00 0.0 ±5%
Flat 0.05–2.00 0.0 ±5%
It 0.05–2.00 0.0 ±5%
I
2
t 0.05–2.00 0.0 ±5%
I
4
t 0.05–2.00 0.0 ±5%
Reset mode Only available if IEC characteristics 0.00–60.00 0.01 x s ±1% resp. ±10 ms
IEC NINV 0.00–60.00 0.01 x s ±1% resp. ±10 ms
IEC VINV 0.00–60.00 0.01 x s ±1% resp. ±10 ms
IEC EINV 0.00–60.00 0.01 x s ±1% resp. ±10 ms
IEC LINV 0.00–60.00 0.01 x s ±1% resp. ±10 ms
Reset curves if ANSI characteristics — — 5%
ANSI MINV — — 5%
ANSI VINV — — 5%
ANSI EINV — — 5%
Flat — — 5%
It — — 5%
I
2
t——5%
I
4
t——5%
Description Range Step Tolerance
I-CBF> If the pick-up value is exceeded, the module/stage will be started. 0.0–0.1 x 1 0.01 x I
n
±1.5% of the setting value resp. 1% I
n
Resetting ratio 0.5% x I
n
——
t-CBF If the delay time is expired, an CBF alarm is given out. — — <+40 ms
Operating time Starting from I higher than 1.3 x I-CBF> — — <+40 ms
Disengaging time — — <+40 ms